ABOUT
History of CSS
Corrugated Steel Structure (CSS) originated from a patent filed in 1896 by American civil engineers James H. Watson and Stanley Simpson. In North America, the technology was applied to small waterway structures until the 1930s, and by the late 20th century, its application range expanded to structures with spans of up to 11 meters. Since the 2000s, the applicable span has been extended to approximately 23 meters, and its use has broadened to various fields including cut-and-cover tunnels, mining structures, bridges, and military protective facilities.
EXSCor® Technical Competitiveness
In 2016, DAEDOTech successfully developed and commercialized EXSCor®, a deep corrugation corrugated steel structure (ASTM A796M Table 37), expanding the maximum applicable span to 40 meters. The system satisfies the maximum load requirements of EURO Code, AASHTO, and AREMA Load standards, and demonstrates strong competitiveness in terms of economic efficiency, structural stability, and constructability compared with conventional multi-stage concrete structures.
With sufficient structural rigidity for wide-span applications, the system provides a solution capable of supporting ultra-heavy loads such as mining haul trucks like the CAT 797F (approximately 620 tons).
EXSCor® has established a technological foundation applicable not only in Korea but also in the U.S. and EU markets, complying with AASHTO LRFD and ASTM A796M standards.
Modular Truss Bridge Solution
DAEDOTech is advancing its capabilities beyond corrugated steel structure technology by enhancing design, analysis, manufacturing, and installation technologies in the field of Modular Truss Bridge Solutions.
Modular Truss Bridge Solutions serve as a key system applicable to disaster response, emergency recovery, military logistics support, transportation connectivity, and both temporary and permanent civil bridge applications, providing rapid installation, structural safety, and operational efficiency simultaneously.
In particular, the system builds upon the strengths of conventional military engineer bridge systems, while integrating mechanized installation, simplified structural configuration, and high load-bearing performance to realize an advanced Modular Truss Bridge Solution.
Civil–Military Dual-Use Strategy
DAEDOTech is pursuing a Civil–Military Dual-Use strategy based on its Modular Truss Bridge Solution. Leveraging military-grade load performance and structural reliability, the system is being expanded to support the safe passage of heavy-load civilian vehicles, including construction dump trucks, heavy equipment transporters, and large logistics trucks.
At the same time, it addresses the performance upgrade and replacement demand for existing M2 Bailey bridges (logistics support bridges), expanding its business scope as a next-generation bridge platform that connects both military logistics support and civilian infrastructure.
Digital Engineering Capability
DAEDOTech conducts continuous research and development to provide design solutions optimized for structural stability and diverse environmental conditions. Through 3D scanning, 3D construction sequence modeling, 3D FEA, 3D printing, and Human-Centered Digital Twin–based engineering, the company delivers integrated design solutions that go beyond the capabilities of conventional providers.
By doing so, DAEDOTech reduces design uncertainties and construction burdens for clients, while providing higher levels of safety, construction efficiency, and operational reliability, continuing to grow as a world-class engineering company.
